Research On The Generation Technology Of Spraying Three-Dimensional Prescription Map Of Apple Orchard Based On Aerial Photography 3D Modeling

In the foreseeable future,pesticides will still play an important role in increasing agricultural production and income as the most effective method for orchard pests and weeds control.Misuse of pesticides not only damages crops,but also increases the cost of agricultural production.Western developed countries have begun to use precise variable spraying technology for spraying.In order to improve the efficiency of pesticide use and reduce the pollution of pesticides,this thesis studies the influence of different UAV flight parameters on the three-dimensional modeling of fruit trees by oblique photogrammetry,and then studies Effects of different fruit tree canopy volumes on spraying rate.Using PIX4 D puzzle,Context Capture three-dimensional modeling,Arc GIS geostatistical analysis and other technical means,a three-dimensional spray prescription map was established.The main work and results of the research are as follows:(1)Obtaining the optimal flight parameters of the UAV.Through the data obtained from 9different oblique photogrammetry UAV parameters in the study area,Context Capture software was used to model the orchard 3D,and visual interpretation was used to obtain the best 3D model,so as to obtain the optimal flight parameters of the UAV.(2)Verification of fruit tree canopy volume.By using the fruit tree volume measured by manual measurement method as the real data,the fruit tree canopy volume obtained in the 3D modeling Context Capture software is used as the verification data,the error is calculated and the average error is 18.75%,and the correct rate of the canopy volume is in more than 80%.(3)Establish a three-dimensional spray prescription map.Use GNSS RTK to obtain the location information of the fruit trees in a row of fruit trees in the orchard,and then measure the canopy volume of the fruit trees in the 3D modeling Context Capture software.Kriging interpolation analysis was performed on the upper and lower canopies to generate a three-dimensional spraying prescription map,which was used to guide farmers to spray accurately in orchards.